The effects of creatine supplementation on the performance of military fitness tests.

Williams, Spencer (2016) The effects of creatine supplementation on the performance of military fitness tests. Undergraduate thesis, University of Chichester.

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Abstract

Purpose: There is limited research relating to effects of creatine monohydrate (Cr) supplementation on military-based fitness tests. This study aims to determine whether an eight day Cr supplementation regimen would affect the performance of military-based fitness tests utilising muscular strength, muscular endurance, anaerobic performance and aerobic fitness. Participants: In a double-blind randomised independent group design study, 18 males (Mean±SD: Age = 20.89±1.23 years, Height = 178.28±8.15 cm, Mass = 85.26±19.75 kg) were matched by the pre-test performance then randomly assigned to Cr and placebo groups before an eight day supplementation regimen. 1) Cr group (Daily dose: 4x5g Cr + 1g maltodextrin). 2) Placebo group (Daily dose: 4x6g maltodextrin). Method: All participants completed four military-based fitness tests pre- and post-supplementation in a set order assessing different fitness components. 1) Static lift strength test (muscular strength) involving three maximal effort repetition; force (N) recorded 2) Water can carry (muscular endurance), which involved walking continuously at set pace (1.5 m.s-1) whilst carrying two 20kg water cans until exhaustion; distance covered (m) recorded. 3) Weighted multiple sprints (anaerobic performance) consisting of five maximal 30m sprints wearing a weighted vest (15kg); sprint times (s) recorded. 4) A multi-stage fitness test (aerobic fitness) which involved running between two lines 20m apart until exhaustion to a signal from an audio compact disc; number of shuttles completed were recorded and used to estimate 2.4km run time (min:s) and V̇O2 max (ml.kg-1.min-1). Indicators of Cr uptake (body mass and total body water) were measured pre- and post-supplementation. Results: A significantly larger change was reported for muscle strength in the static lift strength test between the groups, with the Cr group’s (23.99±11.60%) muscle strength increasing significantly more than the placebo group’s (5.80±10.31%) (p<0.05). The change between the groups was not significantly different for the water can carry, weighted multiple sprints and multi-stage fitness test (p>0.05). Body mass and total body water did not change significantly between the groups following supplementation (p>0.05). Conclusion: An eight day Cr supplementation regimen improved the performance of the military fitness test which assessed muscle strength but not muscular endurance, anaerobic performance and aerobic fitness. Body mass and total body water were also not affected. Future research should examine the effect of Cr supplementation on military fitness tests with a resistance training program.

Item Type: Thesis (Undergraduate)
Additional Information: BSc (Hons) Sport & Exercise Science (Sports Performance)
Subjects: Q Science > Q Science (General)
Divisions: Departments > Sport and Exercise Sciences
Undergraduate Dissertations
Depositing User: Ann Jones
Date Deposited: 21 Sep 2016 14:34
Last Modified: 21 Sep 2016 14:34
URI: http://eprints.chi.ac.uk/id/eprint/1982

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